A simple and easy green synthesis of silver nanoparticles (Ag NPs) was prepared using Sapindus emarginatus stem bark extract and anchored over graphitic carbon nitride (g-C₃N₄) surface. The synthesized materials characterized by UV–Visible, XRD, FESEM, FETEM, FT-IR and Raman spectroscopy ensured the development of Ag NPs anchored over the g-C₃N₄ surface. The prepared catalyst was utilized for Methylene Blue (MB) dye degradation through visible light photocatalysis. The optimization of operational parameters, like the effect of catalyst dosage, H₂O₂ concentration and slurry pH, was performed. The results exhibited that compared to pristine g-C₃N₄, photocatalytic efficacy was enhanced two-fold in Ag@g-C₃N₄. Also, the prepared Ag@g-C₃N₄ showed a faster catalytic MB dye reduction (25 s) in the presence of NaBH₄. The catalyst was recovered from the reaction solution by centrifugation and reused for five consecutive cycles. The results showed that there was no significant loss in the efficiency of the catalyst. These results confirmed that the green synthesized Ag@g-C₃N₄ is likely advantageous for organic pollutants degradation.

使用Sapindus emarginatus茎皮提取物制备并锚固在石墨氮化碳（gC ₃ N ₄）表面上，可以简单，轻松地绿色合成银纳米颗粒（Ag NPs）。以紫外-可见，X射线衍射，FESEM，FETEM，FT-IR和拉曼光谱为特征的合成材料确保了锚定在gC ₃ N ₄表面的Ag NP的发展。通过可见光光催化将制备的催化剂用于亚甲基蓝（MB）染料的降解。进行了操作参数的优化，例如催化剂用量，H ₂ O ₂浓度和浆料pH的影响。结果表明，与原始gC ₃相比N ₄，在Ag @ gC ₃ N _4中的光催化效率提高了两倍。同样，在NaBH ₄存在下，制备的Ag @ gC ₃ N ₄显示出更快的催化MB染料还原（25 s）。通过离心从反应溶液中回收催化剂，并重复使用五个连续循环。结果表明，催化剂的效率没有明显的损失。这些结果证实绿色合成的Ag @ gC ₃ N ₄可能有利于有机污染物的降解。